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Entering and Modifying Source Programs
4-12
4
(always hexadecimal) is returned. Because the disassembler gives
precedence to instructions, a word of data that corresponds to a
valid instruction will be returned as the instruction.
Entering a Source Line
A new source line is entered immediately following the
disassembled line, using the format discussed in the section on
Source Line Format:
PPC1-Bug>AS 20000 <CR>
00020000 3C600004 ADDIS R3,R0,$4? ORI R3,R0,4 <CR>
When the carriage return is entered terminating the line, the old
source line is erased from the terminal screen, the new line is
assembled and displayed, and the next instruction in memory is
disassembled and displayed.
00020000 60030004 ORI R3,R0,$4
00020004 60631000 ORI R4,R4,$1000? <Return>
If a printer is being used, port 0 should be reconfigured as the
printer port (hardcopy mode) for proper operation (refer to the PF
command in Chapter 3). In this case, the above example would look
as follows:
PPC1-Bug>AS 20000 <Return>
00020000 3C600004 ADDIS R3,R0,$4? ORI R3,R0,4 <Return>
00020000 60030004 ORI R3,R0,$4
00020004 60631000 ORI R4,R4,$1000? <CR>
Another program line can now be entered. Program entry
continues in like manner until all lines have been entered.
Enter a period to exit either the MM or AS command.
If an error is encountered during assembly of the new line, an error
message will be displayed. The location being accessed is
redisplayed.
PPC1-Bug>AS 30000 <CR>
00030000 3CA00000 ADDIS R5,R0,$0? ORU R5,R0,1 <Return>
Assembler Error: Unknown Mnemonic
00030000 3CA00000 ADDIS R5,R0,$0?
- Firmware Package 1
- User’s Manual 1
- Parts 1 & 2 1
- Restricted Rights Legend 2
- Contents 7
- List of Tables 15
- List of Figures 17
- 1General Information 19
- PPCBug Implementation 20
- Memory Requirements 21
- Start-up 22
- General Information 23
- Auto Boot 31
- Length Contents Description 33
- Sample ROMboot Routine 34
- Network Auto Boot 36
- Restarting the System 37
- Board Failure 39
- MPU Clock Speed Calculation 40
- Disk I/O Support 41
- Device Probe 42
- Disk I/O Error Codes 45
- Network I/O Support 46
- RARP and ARP Modules 48
- BOOTP Module 48
- TFTP Module 48
- Network Boot Control Module 48
- Network I/O Error Codes 49
- Data and Address Sizes 51
- Byte Ordering 52
- 2Using the Debugger 53
- Command Arguments 54
- ADDR Formats 56
- Using the Debugger 57
- Command Options 58
- Control Characters 59
- Exception Vectors 62
- MPU Registers 62
- Context Switching 63
- Floating Point Support 65
- Single Precision Real 66
- Double Precision Real 66
- Scientific Notation 67
- 3Debugger Commands 69
- Debugger Commands 70
- Command Description 70
- AS - One-Line Assembler 72
- BC - Block of Memory Compare 73
- BF - Block of Memory Fill 75
- H Half-word 78
- $000FFFFF 79
- BM - Block of Memory Move 80
- BR - Breakpoint Insert 83
- NOBR - Breakpoint Delete 83
- BS - Block of Memory Search 85
- BV - Block of Memory Verify 90
- CM - Concurrent Mode 93
- NOCM - No Concurrent Mode 93
- A List all supported devices 94
- CS - Checksum 101
- Examples 102
- Read Data = 01000013 103
- PPC1-Bug> 103
- DC - Data Conversion 105
- DMA - Block of Memory Move 108
- Effective address: C1000000 110
- Effective address: C1FFFFFF 110
- D32 block transfer cycles 112
- DS - One-Line Disassembler 116
- DU - Dump S-Records 117
- ECHO - Echo String 119
- ENV - Set Environment 121
- PPC1-Bug>fork 1 10000 126
- PPC1-Bug>forkwr 1 127
- More stuff in between 138
- GN - Go to Next Instruction 142
- GO - Go Execute User Program 144
- Set a breakpoint 148
- HE - Help 150
- IDLE - Idle Master MPU 154
- IOC - I/O Control for Disk 155
- IOI - I/O Inquiry 158
- T Format a disk track 163
- D Format the entire disk 163
- Example 2: 174
- LO - Load S-Records from Host 176
- MA - Macro Define/Display 182
- NOMA - Macro Delete 182
- M=MD 3000 <Return> 183
- M=GO \0 <Return> 183
- M= <Return> 183
- MAE - Macro Edit 185
- MAL - Enable Macro Listing 187
- NOMAL - Disable Macro Listing 187
- MAR - Load Macros 188
- MAW - Save Macros 190
- MD, MDS - Memory Display 192
- Example 5: 194
- Example 6: 194
- Example 7: 195
- Example 8: 195
- MENU - System Menu 196
- MM - Memory Modify 197
- MMD - Memory Map Diagnostic 201
- MS - Memory Set 203
- MW - Memory Write 204
- Example 3: 205
- NAB - Network Auto Boot 206
- NAP - NAP MPU 207
- NIOC - Network I/O Control 214
- NIOP - Network I/O Physical 220
- <Return> 229
- NPING - Network Ping 231
- PPC1-Bug>OF <Return> 235
- PA - Printer Attach 236
- NOPA - Printer Detach 236
- Command Input 238
- Arguments 238
- Loading: Operating System 244
- Partition Not Bootable 244
- PF - Port Format 246
- NOPF - Port Detach 246
- N Disabled 248
- PFLASH - Program FLASH Memory 251
- RB - ROMboot Enable 256
- NORB - ROMboot Disable 256
- RD - Register Display 258
- REMOTE - Remote 264
- RESET - Cold/Warm Reset 265
- RL - Read Loop 267
- RM - Register Modify 268
- RS - Register Set 271
- RUN - MPU Execution/Status 273
- SD - Switch Directories 275
- SET - Set Time and Date 276
- SROM - SROM Examine/Modify 277
- Examples: 278
- SYM - Symbol Table Attach 279
- NOSYM - Symbol Table Detach 279
- Offset Field Description 280
- Example 4: 281
- T - Trace 284
- Initialize IP and R3, R4: 285
- Trace next instruction: 286
- Trace the next instruction: 287
- Breakpoint is displayed) 287
- TA - Terminal Attach 288
- TIME - Display Time and Date 289
- TM - Transparent Mode 290
- S7056504000091 297
- WL - Write Loop 303
- Part 2 of 2 305
- Conventions 308
- Safety Summary 309
- Safety Depends On You 309
- Disclaimer of Warranty 310
- 4One-Line Assembler/ 311
- Disassembler 311
- Directives 312
- Source Program Coding 313
- Instructions 316
- Addressing Modes 318
- WORD Define Constant Directive 319
- SYSCALL System Call Directive 320
- Entering a Source Line 322
- Entering Branch Operands 323
- Assembler Error Messages 324
- 5System Calls 325
- System Call Routines 326
- System Call function 327
- .INSTAT 332
- <CR> 333
- .READSTR 334
- I/O Support on page 1-23 335
- .READLN 336
- .CHKBRK 337
- .DSKRD 338
- Field descriptions: 339
- .DSKCFIG 341
- Command Packet 342
- Table 5-8. CFGA Fields 349
- .DSKFMT 351
- Entry Conditions 352
- .DSKCTRL 354
- .NETRD 356
- .NETCFIG 358
- Most SigniÞcant Word 360
- .NETFOPN 364
- .NETFRD 366
- .NETCTRL 368
- .OUTCHR 371
- .OUTSTR 372
- .WRITE 373
- .WRITELN 373
- .ERASLN 375
- .WRITD 376
- .WRITDLN 376
- .WRITD .WRITDLN 377
- Z is included if 377
- .SNDBRK 378
- .RTC_TM 380
- .RTC_DT 381
- .RTC_DSP 382
- .RTC_RD 383
- .REDIR_I 385
- .REDIR_O 385
- .RETURN 386
- .BINDEC 387
- .CHANGEV 388
- .STRCMP 389
- .MULU32 390
- .DIVU32 391
- .CHK_SUM 392
- .BRD_ID 393
- .ENVIRON 396
- .PFLASH Function 400
- .DIAGFCN 403
- F 405
- Example 1: .CHKFCN 411
- Example 2: .TESTSTAT 411
- Example 3: .MEMSTAT 412
- Example 4: .ST_NMLIST 413
- .SIOPEPS 415
- .FORKMPU Function 417
- .FORKMPUR Function 418
- .IDLEMPU Function 423
- I/O Control Structure 427
- .IOINFORM 430
- Port Control Structure 431
- .IOCONFIG 432
- .IODELETE 433
- .SYMBOLTA 435
- .SYMBOLTD 437
- Related Documentation 439
- Document Title and Source 441
- Publication 441
- Related Specifications 447
- Related Specifications 449
- BSystem Menu 451
- Go to System Diagnostics 452
- Initiate Service Call 452
- Display System Test Errors 452
- Dump Memory to Tape 452
- System Menu 453
- Tape Dump Example: 454
- Operation 455
- Enter System ID Number: 456
- Enter phone number: 456
- Manual Connection 459
- Terminal Connection 461
- CPPCBug Messages 463
- Other Messages 464
- -not found 466
- OK to proceed (y/n)? 466
- Press “RETURN” to continue 466
- WARM Start 466
- DS-Record Format 467
- S-Record Types 468
- Creating S-Records 470
- S-Record Format 473
- T L A C/D Ch 473
- EDisk and Tape Controllers 475
- PPC1Bug version 1.2 477
- FDisk Status Codes 479
- ATAPI (CD-ROM Drives) 480
- SCSI Firmware Status Codes 481
- GNetwork Controller Devices 487
- HNetwork Communication 489
- Status Codes 489
- Glossary 493
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